Intel Core i3 Processors
An Intel Core i3 processor is a fairly limited processor, powerful enough for standard PC use including: most office applications, movies, music, standard internet browsing, and even some light gaming. If you need a lower cost PC that is still super reliable, an i3 CPU is a good choice.
Intel Core i5 Processors
An Intel Core i5 processor is a robust, but somewhat limited processor. It is powerful enough for all standard PC use, including movies, music, standard internet browsing, and even some moderate gaming and standard office related tasks. If you need a standard PC for your daily life, an i5 CPU is a good choice.
Intel Core i7 Processors
An Intel Core i7 processor is the top-of-the-line processor (for the consumer oriented Socket 1150). i7 processors are powerful, and are very good at multi-tasking in a professional environment, as well as most CPU intense gaming. If you need a PC for work, an i7 CPU is probably your best choice.Socket 1150 and Socket 2011 Performance Levels